136 
Floscularia coronetia. 
t Monthly Microscopical 
Journal, Sept. 1, 1869. 
of the specific horn in F. cornuia (Plate XXV., Figs. 2, 3, 4, 
and 5). There is, however, a physiological distinction with the 
dorsal lobe of this species which will be described in a subsequent 
paragraph. 
An individual of this species when fully extended measures gVth 
of an inch from the foot attachment to the knobs on the frontal lobes, 
beyond which the setae can be definitely measured to a distance of 
-^Vth of an inch, and at such times far excels in grace and elegance 
of figure any one of the others, the body curving easily up from the 
footstalk terminating frontally in a miniature coronet, and hence 
its specific title ; but its refined symmetry is frequently diminished 
by being contracted to the extent of one-fourth of its length, with 
its body more swollen and rounded, and its footstalk drawn into 
numerous transverse wrinkles, characteristic of the family. These 
periods I notice are times of repletion. 
Generally, the gelatinous case is scarcely to be detected, except 
from the accumulation of filamentous algae and particles of floccose 
matter that are gathered and attached round about the posterior 
regions, giving it a much broader and shorter appearance than is ever 
seen in the tubes of other species, this extraneous matter reaching 
only a little beyond the footstalk of the expanded animal, which 
when withdrawn within this shelter is extremely difficult to find, 
from the general resemblance of the body and stalk to the surround- 
ing aggregation of particles and filaments : unlike F. campanulata, 
it is extremely sensitive to external interruption, remaining long in 
retreat before venturing on its cautious and deliberate eversion ; 
and to these particulars, added to that of its scarcity — occurring 
only once among a hundred others — may be attributed the fact of 
its having hitherto escaped observation. 
The hyaline tube however, is present, projecting well up into 
the neck, far above the nest-like vegetable aggregation, studded 
throughout its mass with granules, which, by their passive repose 
in the midst of myriads of restless monads and oscillatorise, give 
the first and almost only intimation of the presence of their viscous 
matrix, except at certain periods after acts of evacuation, when it 
is seen to be more profusely pervaded with granules of the ejecta- 
menta, particularly along the body of the inhabitant, which in 
retracting leaves most distinctly revealed the internal walls of the 
tube, conforming exactly to its outline, and rendered the more 
distinct by reason of a greater preponderance at this part of the 
voided infusorial particles in varying stages of disintegration, which 
clearly proves that the tube is in this species at all events of a viscid 
character, the same as that of Stephanoceros. 
I will not presume to offer a description of the respiratory, 
nutritive, muscular, and reproductive systems which are physiologi- 
cally common to the genus, and are so admirably described by Mr. 
